# Parameter :: 8. `output::`
Output file path for export operations.
**Type:** [`StoragePath`](../type/10_storage_path.md)
**Fundamental Type:** String (filesystem path)
**Constraints:**
- Must be a non-empty string
- Parent directory must exist (error if parent does not exist)
- File is overwritten without warning if it exists
**Default:** none — **required**
**Commands:** `.export`
**Purpose:** Specifies where the exported session content is written. Accepts absolute and `~`-prefixed paths.
**Examples:**
```bash
# Valid values
output::conversation.md # Relative path
output::/home/user/exports/chat.md # Absolute path
output::~/exports/session.json # Home-relative path
# Error cases
output:: # Empty path error
output::/nonexistent/dir/file.md # Parent directory does not exist
```
### Referenced Type
| [`StoragePath`](../type/10_storage_path.md) | String (filesystem path) | String | Non-empty; parent directory must exist |
### Referenced Commands
| 6 | [`.export`](../command/06_export.md) | none — required | Destination path for exported file |
### Referenced User Stories
| 3 | [Export Session for Review](../user_story/003_export_session_for_review.md) | developer |